16562343649 has 4 divisors (see below), whose sum is σ = 16564748464. Its totient is φ = 16559938836.

The previous prime is 16562343617. The next prime is 16562343709. The reversal of 16562343649 is 94634326561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16562343649 - 2⁵ = 16562343617 is a prime.

It is a super-2 number, since 2×16562343649² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16562343949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1192047 + ... + 1205860.

It is an arithmetic number, because the mean of its divisors is an integer number (4141187116).

Almost surely, 2^16562343649 is an apocalyptic number.

It is an amenable number.

16562343649 is a deficient number, since it is larger than the sum of its proper divisors (2404815).

16562343649 is an equidigital number, since it uses as much as digits as its factorization.

16562343649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2404814.

The product of its digits is 2799360, while the sum is 49.

The spelling of 16562343649 in words is "sixteen billion, five hundred sixty-two million, three hundred forty-three thousand, six hundred forty-nine".